Screw-driver.



11. KING'KINER & W. SCOTT.

SCREW DRIVER.

APPLICATION FILED JUNE '1, 1910.

984,932, Patenten'tFeb..21,1911

HORACE KINCKINER, OF NORRISTOWN, AND WALTER SCOTT, 0F PHILADELPHIA,

. PENNSYLVANIA.

SCREW-DRIVER.

Specification of Letters Patent.

Patented Feb. 21, 1911.

Application filed June 7, 1910. Serial No. 565,551.

To all whom it may concern:

Be it known that we, HORACE KINGKINER and lVAL'rnR Soo'r'r, citizensofthe United States, residing, respectively, at (1) Norristown, countyof Montgomery, and State of Pennsylvania, and (2) Philadelphia, in thecounty of Philadelphia and State of Pennsylvania, have invented certainnew and useful Improvements in Screw-Drivers, of which the following isa specification.

This invention relates to screw drivers and has for its object toprovide a tool of such class in a manner as hereinafter set forthwhereby when occasion so requires the blade can be conveniently detachedfrom the handle of the tool and another blade fixedly secured to thehandle, thereby providing what may be termed a changeable blade screwdriver so that one handle can be employed for blades of various sizes. I

Further objects of the invention are to provide a changeable blade screwdriver adapted for use for machinists, carpenters and electricians andwhich shall be simple in its construction and arrangement, strong,durable, efficient in its use, permitting of one convenientlysubstituting one blade for another, and inexpensive to manufacture.

With the foregoing and other objects in view, the invention consists ofthe novel construction, combination and arrangement 'of parts ashereinafter more specifically described and illustrated in theaccompanying drawings wherein is shown the preferred embodiments of theinvention but it is to be understood that changes, variations andmodifications can be resorted to which come within the scope of theclaims hereunto appended.

In the drawings wherein like reference characters denote correspondingparts throughout the several views: Figure 1 is an elevation partly insection and with the shank of the blade broken away of a screw driver inaccordance with this invention. Fig. 2 is an elevation of a frameforming an element of the screw driver. Fig. 3 is a view looking towardone end of the frame. Fig. 4: is a View looking toward the other end ofthe frame. Fig. 5 is anelevation of a portion of the shank of the blade,and, Fig. 6 is a view similar to Fig. 1 of a modification.

A screw driver in accordance with this invention includes a handle, abody-portion in the form of a frame, a blade, and a coupling cap.

The handle as shown in Fig. 1 consists of two sections 7 and 8,constructed of any suitable material, preferably wood. Each handlesection is provided with a transverselyextending opening 9, the openingin one section opposing the opening in the other section and each of thehandle sections has its inner face cut-away to provide a pair ofsemi-cylindrical grooves 10, 11, the latter being of greater depth thanthe former whereby a shoulder 12 is provided. The handle sections 7, 8,when in position are arranged opposite each other and have interposedtherebetween the body-portion which is in the form of a cage and when inposition has its side edges flush with the longitudinal edges of thehandle sections 7 and 8, and has one end thereof flush with one end ofthe sections 7 and 8.

As before stated the body-portion is in the form of a frame whichconsists of a pair of longitudinally-extending bars or mem bers 13, 14connected together intermediate their ends by a transversely-extendinghollow cylindrical bearing member 15 formed with a. pair ofdiametrically opposed openings 16 having the walls thereofscrewthreaded. The openings 16 when the handle sections 7 and 8 are inposition register with the openings 9 in the handle sections. Themembers 13, 1 1 at one end are connected together by atransversely-extending member 17 having the central portion thereofenlarged to provide a hollow cylindrical hearing portion 18 which is inalinement with the bearing member 15. The members 13, 14 converge towardeach other as at 19 and terminate in a collar 20 formed with a pair ofoff-sets 21. The collar 20 and oif-sets 21 terminate in a head 22 oflarger diameter than the collar 20, thereby forming the shoulders 28,24:. The head 22 is formed with an opening 25 which registers with theopening of the collar 20 and is also in alinement with the openingthrough the member 15 and the opening through the portion 18. The wallof the opening 25 of the head is formed with a pair ofdiametrically-opposed pocket-s 26. The handle sections 7 and 8 aresecured in position with respect to the frame through the medium of apair of screws or other suitable hold-fast devices 27 which extendthrough the openings 9 and engage in the screw-threaded openings 16 ofthe member 15 as clearly shown in Fig. 1.

The reference character 28 denotes the blade having an elongatedcylindrical shank 29 which when the blade is in position, extendsthrough the head 22, collar 20, bearing member 15 and cylindricalportion 18 of the member 17. The shank 29 is of such length as toproject from the member 17 and the said projecting end of the shank 29is screw-threaded as at 30. To limit the movement'of the shank 29 whenpositioning the same in the frame and to also prevent the turning of theshank 29 within the handle, the shank is provided with a pair oflaterally-extending lugs 31 which are adapted to be seated in thepockets 26 of the head 22. To couple the shank 29 with the frame acoupling cap 82 is employed and which is formed with a screw-threadedrecess 33 for the reception of the threaded end 30 of the shank 29whereby when-the cap 32 is in the position as shown in Fig. 1 the shankwill be fixedly secured to the frame.

Then the handle sections 7, 8, are mounted in position with respect tothe frame, the bearing member 15 abuts against the shoulder 12 asclearly shown in Fig. 1 and when the cap 32 is screwed l1ome,'the frameis clamped so that the members 15 will snugly engage the handle sectionsand the lugs 31 will be clamped against the inner wall of the pockets 26whereby the elements of the driver will be fixedly coupled together toprevent any looseness when the tool is employed.

The modification as illustrated in Fig. 6 is designed for the use ofelectricians and the handle is formed of one piece, preferably wood,'andis indicated by the reference character 34. The handle 34 is providedwith a longitudinally-extending bore of two different diameters, thesmaller indicated by the reference character 55 and the larger by thereference character 36. By providing the bore of two differentdiameters, a shoulder 37 is formed against which abuts the member 15 ofthe frame. The wall of the bore of the handle is formed with grooves forthe reception of the members 18, 14: of the frame. The handle 34L whenin position incloses the frame and abuts against the collar 22. The capwhich engages the screw-threaded end 30 of the shank 29 of the blade isformed of suitable insulating material and the cap is indicated by thereference character 38. Otherwise than that as stated, the constructiondisclosed in Fig. 6 is the same as that shown in Fig. 1.

It will be assumed that the tool is set up in a manner as shown in Figs.1 and 6 and that it is desired to remove the blade and ,by passing theshank through the frame and seating the lugs 31 m the pockets 26,

the screw-threaded cap is then mountcd upon the screw-threadedprojecting end of the shank and the blade is then fixedly secured inposition. The cap when in position abuts against one end of the frameand one end of the handle, as clearly shown in Figs. 1 and 6.

.Vhat we claim is:

1. In combination in a screw-driver, a frame including a pair oflongitudinallyextending bars, a pair of transversely-extending hollowbearing members and a collar carrying a head formed with an opening inalinement with the openings in the bearing members and collar, saidcollar formed integral with one end of said bars and one of said membersformed integral with the bars intermediate their ends and the other ofsaid members formed integral with the bars at the other end thereof,said head of greater diameter than said collar, a removable bladeprovided with a shank extending through and projecting from one end ofthe frame and having the projecting end screwthreaded, means wherebysaid shank is prevented from turning within the frame, a handle mountedupon the frame and abutting against the head, and a cap engaging thescrew-threaded end of the shank and abutting against the handle wherebythe blade is coupled to the frame. 7 V

2. In combination in a screw-driver, a frame including a pair oflongitudinallyextending bars, a pair of transversely-extending hollowbearing members and a collar carrying a head formed with an opening inalinement with the openings in the hearing members and collar, saidcollar formed integral with one end of said bars and one of said membersformed integral with the bars intermediate their ends and the other ofsaid members formed integral with the bars at the other endthereof,,said head of greater diameter than said collar,a removableblade provided with a shank extending through and projecting from oneend of the frame and having the projecting. end screw-threaded, meanswhereby sald shank is prevented from turnlng withln the frame,

said intermediate bearing member provided with a pa1r of threaded openngs, a handle openings for securing the handle to the frame, and a capmounted upon the screwthreaded end of the shank and abutting against thehandle and one of said bearing members for coupling the blade to theframe.

3. In combination in a screw-driver, a frame comprising a pair oflongitudinallyextending bars and a pair of transverselyextending membershaving centrally-disposed hollow cylindrical portions constitutingbearings, said frame further including a collar and ahead integral withand of greater diameter than the collar, said collar formed integralwith one end of said bars, one of said members formed integral with theother end of said bars and the other of said members formed integralwith the bars intermediate the ends thereof, a removable blade providedwith a shank extending through the head, collar and bearings andprojecting from one end of the frame, the projecting end of said shankbeing threaded, a cap mounted upon the projecting end of the shank forcoupling the blade to the frame, a handle mounted against the frame andinterposed betweenthe cap and the head, and means whereby said shank isprevented from turning within the frame.

4.. In combination in a screw-driver, a frame comprising a pair oflongitudinally-extending bars and a pair of transversely-extendingmembers having centrally-disposed hollow cylindrical portionsconstituting bearings, said frame further including a collar and a headintegral with and of greater diameter than the collar, said collarformed integral with one end of said bars, one of said members formedintegral with the other end of said bars and the other of said membersformed integral with the bars intermediate the ends thereof, a removableblade provided with a shank extending through the head, collar andbearings and project ing from one end of the frame, the projecting end.of said shank being threaded, a cap mounted upon the projected end ofthe shank for coupling the blade to the frame, said intermediate memberprovided with a pair of screw-threaded openings, a handle formed of twosections mounted against said frame and interposed between the cap andthe head, each of said handle sections provided with an opening,hold-fast devices extending through the openings of the handle sectionsand engaging in the threaded openings of said member whereby the handlesections are coupled to the frame, and means whereby said shank isprevented from turning in the frame.

5. In combination in a screw-driver, a frame comprising a pair oflongitudinallyextending bars, and a pair of transverselyextendingmembers having centrally-disposed hollow cylindrical portionsconstituting bearings, said frame further including a collar and a headintegral with and of greater diameter than the collar, said collarformed integral with one end of said bars, one of said members formedintegral with the other end of said bars and the other of said membersformed integral with the bars intermediate the ends thereof, a removableblade provided with a shank extending through the head, collar andbearings and projecting from one end of the frame, the projecting end ofsaid shank being threaded, a cap mounted upon the projected end of theshank for coupling the blade to the frame, a handle mounted against theframe and interposed between the cap and the head, said head providedwith a pair of pockets, and a pair of lugs carried by the shank andadapted to engage in the pockets to prevent turning of the shank in theframe.

6. In combination in a screw-driver, a frame comprising a pair oflongitudinallyextcnding bars, and a pair of transverselyextendingmembers having centrally-disposed hollow cylindrical portionsconstituting bearings, said frame further including a collar and a headintegral with and of greater diameter than the collar, said collarformed integral with one end of said bars, one of said members formedintegral with the other end of said bars and the other of said membersformed integral with the bars intermediate the ends thereof, a removableblade provided with a shank extending through the head, collar andbearing's and projecting from one end of the frame, the projecting endof said shank being threaded, a cap mounted upon the projected end ofthe shank for coupling the frame to the blade, said intermediate memberprovided with a pair of screw-threaded openings, a handle formed of twosections mounted against said frame and interposed between the cap andthe head, each of said handle sections provided with an opening,hold-fast devices extending through the openings of the handle sectionsand engaging in the threaded openings of said member whereby the handlesections are coupled to the frame, said head provided with a pair ofpockets, and a pair of lugs carried by the shank and adapted to engagein the pockets to prevent turning of the shank in the frame.

In testimony whereof we affix our signatures in presence of twowitnesses.

HORACE KINOKINER. WVALTER SCOTT.

Witnesses:

En. HOLT, Jr., W. S. HoLsoR.

